CN101686485B - Method for fetching high speed downlink packet access transmission throughput and system thereof - Google Patents
Method for fetching high speed downlink packet access transmission throughput and system thereof Download PDFInfo
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Abstract
The invention discloses to a method for fetching high speed downlink packet access (HSDPA) transmission throughput, which is used for solving the problems that network simulation to a wireless network system after HSDPA technology is brought in is complex and the fetched HSDPA transmission throughput is inaccurate in the prior art. The method is that: Firstly, fetch pilot signal quality of each HSDPA user in at least one HSDPA user according to fetched location information of at least one high speed downlink packet access HSDPA user in a planning area, then select HSDPA users with set amount in each district as scheduling HSDPA users to transfer data according to the pilot signal quality of each HSDPA user by a set scheduling policy, finally, determine HSDPA transmission throughput in the district according to the location information of each scheduling HSDPA user in each district. The invention also discloses a network simulation system for fetching HSDPA transmission throughput.
Description
Technical field
The present invention relates to wireless communication technology field, relate in particular to and obtain the method and system that high speed downlink packet inserts (HSDPA, HighSpeed Downlink Packet Access) throughput of transmissions in a kind of network simulation.
Background technology
At code division multiple access (CDMA; When Code Division Multiple Access) carrying out wireless network planning in the system; Consider because the close coupling property between the caused network coverage such as multiple access interference and the network capacity; Therefore need carry out modeling to Radio Network System, the capacity of wireless network planned through emulation technology.At present, wireless network planning software has mostly adopted the STATIC SIMULATION method based on law of great number for the network simulation of capacity, and this emulation mode has also obtained the approval of industry.But the network simulation for the Radio Network System after the introducing of HSDPA technology does not also have ripe method at present.
The HSDPA technology is a kind of descending enhanced scheme that third generation partner program the 5th edition (3GPP Release5,3rd GenerationPartnership Project) proposes.The main target of HSDPA is the high speed support to Packet data service, under the exigent situation of message transmission rate, obtains lower time delay, higher system throughput capacity and stronger service quality (QoS, Quality of Service) and guarantees.The HSDPA technology mainly comprises: adaptive coding adjustment (AMC; Adaptive Code and Modulation) technology, mixing retransmit (HARQ; Hybrid Automatic Retransmission Request) technology, fast packet scheduling (PS, Packet Scheduling).
Wherein, the AMC technology is through changing modulation and coded format, to be complementary with current signal quality of receiving or signal conditioning.Like this, under the certain condition of base station transmitting power, can bring into play network capacity to greatest extent, obtain maximum Network Transmission throughput.Adopt after the AMC technology, network can be chosen in transmission block maximum under the condition that satisfies transmission reliability according to channel quality and transmit, and makes network transmission speed reach maximum.
Simultaneously; Wireless channel environment is again complicated and changeable in real network; When base station selected certain transformat transmits, undergo mutation at channel circumstance, in the time of can not satisfying transmission reliability; The base station can be adopted the HARQ technology that data are sent in the base station and retransmitted, and guarantees the reliability that receives.Therefore the AMC technology can guarantee the validity of HSDPA Network Transmission, and the HARQ technology is used for guaranteeing the reliability of HSDPA Network Transmission.
User distribution has randomness, and the residing position of different user is different, and its channel circumstance is also inevitable different, can be better such as the user's nearer channel circumstance from the base station, and user's far away channel circumstance can be weaker from the base station.Network is interior at one time can only select limited user to carry out transfer of data; The 3GPP normalized definition is 4 at most; Therefore just must in these numerous users, select some users to carry out transfer of data; Scheduling just, selecteed user is referred to as dispatched users, and selection scheduling user's method is referred to as scheduling strategy among the multi-user that comforms.The scheduling feature of different user is placed on base station side and realizes that it is shorter its dispatching cycle to compare the R4 network, so be referred to as PS in the HSDPA system.The Network Transmission throughput that the scheduling strategy difference causes finally can obtaining is also different.
The HSDPA technology has adopted key technologies such as AMC, HARQ, PS, and these technology all need the correlation of binding time, and the method for the network simulation of the Radio Network System after introducing for the HSDPA technology at present has:
Method one, because HSDPA has used key technologies such as AMC, HARQ, PS, and in the lifting for network capacity now of its advantage final body, promptly to the lifting of network downlink throughput capacity.Lifting ratio for the transmission rate that adopts fast dispatch to bring can obtain certain empirical value through system emulation, and therefore when carrying out network simulation, the transmission rate that can obtain according to certain some signal quality level directly multiply by this lifting ratio and gets final product.For example; The lifting capacity that draws at dense city environment lower network capacity through the system emulation interpretation of result is 20%; And can know that according to certain some signal quality transmission rate that this point can reach is R the time, adopting the transmission rate that can obtain after the HSDPA technology so is R* (1+0.2).
Method two, STATIC SIMULATION obtain signal quality distribution in the network, obtain the HSDPA throughput through plug-in HSDPA throughput analysis module then.For example STATIC SIMULATION obtains after ratio (SINR) distribution situation of available signal power and interference noise power in the network; HSDPA throughput analysis module is initiated the characteristic of data service according to different user; According to certain scheduling strategy; Select the user to carry out transfer of data, thereby obtain to use HSDPA technology network downlink throughput capacity afterwards.
But method one has been ignored the influence for network capacity of user distribution characteristic and heterogeneous networks structure, so it realizes too simply not meeting the real network characteristic; For method two, need be by means of HSDPA throughput analysis module, in conjunction with the data service characteristic, dynamic analog data service correlation in time, implementation method is complicated, and plug-in throughput analysis module depends on the accuracy of business model.
Summary of the invention
In view of this; The embodiment of the invention provides the method for obtaining the HSDPA throughput of transmissions in a kind of network simulation; Carry out network more complicated when imitative in order to solve in the prior art Radio Network System after the HSDPA technology introduced, and obtain the inaccurate problem of HSDPA throughput of transmissions.
Obtain the method for HSDPA throughput of transmissions in a kind of network simulation that the embodiment of the invention provides, comprising:
According at least one high-speed downlink packet access HSDPA user position information in the planning zone that obtains, obtain each HSDPA user's among said at least one HSDPA user pilot signal quality;
Pilot signal quality according to said each HSDPA user selects the HSDPA user who sets quantity in each sub-district to carry out transfer of data as the scheduling HSDPA user with the scheduling strategy that is provided with;
Confirm this sub-district HSDPA throughput of transmissions according to each scheduling HSDPA user position information in each sub-district.
The network (WSN) emulation system of a kind of HSDPA of obtaining throughput of transmissions that the embodiment of the invention provides comprises:
Obtain the unit, be used for obtaining each HSDPA user's among said at least one HSDPA user pilot signal quality according at least one HSDPA user position information in the planning zone that obtains;
Scheduling unit is used for selecting the HSDPA user who sets quantity in each sub-district to carry out transfer of data as the scheduling HSDPA user according to said each HSDPA user's pilot signal quality with the scheduling strategy that is provided with;
Confirm the unit, be used for confirming this sub-district HSDPA throughput of transmissions according to each scheduling HSDPA user position information in each sub-district.
In the network simulation of the embodiment of the invention; At first according at least one high-speed downlink packet access HSDPA user position information in the planning zone that obtains; Obtain each HSDPA user's among said at least one HSDPA user pilot signal quality; Pilot signal quality according to said each HSDPA user carries out transfer of data with the HSDPA user who sets quantity in each sub-district of scheduling strategy scheduling that is provided with as the scheduling HSDPA user then, confirms this sub-district HSDPA throughput of transmissions according to each scheduling HSDPA user position information in each sub-district at last, like this; To the Radio Network System after the introducing of HSDPA technology; Under the prerequisite that does not increase the STATIC SIMULATION computation complexity, obtain reasonably HSDPA throughput of transmissions accurately, thereby the better planning of accomplishing the Radio Network System after the HSDPA technology introduced.
Description of drawings
Fig. 1 is the flow chart of the method in the embodiment of the invention network simulation;
Fig. 2 is the method flow diagram of embodiment one in the embodiment of the invention;
Fig. 3 is the regional HSDPA user's of simulation planning in the embodiment of the invention a distribution map;
Fig. 4 is the method flow diagram of embodiment two in the embodiment of the invention;
Fig. 5 is the method flow diagram of embodiment three in the present invention's enforcement;
Fig. 6 is for obtaining the system construction drawing of the network simulation of HSDPA throughput of transmissions in the present invention's enforcement.
Embodiment
Network (WSN) emulation system like this, has obtained the HSDPA throughput of transmissions through to the emulation one by one of key technologies such as AMC, HARQ, PS among the HSDPA in the embodiment of the invention in network simulation, and detailed process is following, referring to Fig. 1:
Step 101: obtain at least one HSDPA user position information in the planning zone.Here can be with in the various possible HSDPA user distribution fan-in network analogue systems in the planning zone; Network (WSN) emulation system also obtains the essential information of each sub-district in the planning zone simultaneously; The base station location that comprises each sub-district, each sub-district HSDPA traffic channel transmission power and antenna gain pattern or the like.
Step 102:, obtain each HSDPA user's in each sub-district pilot signal quality according to each HSDPA user position information among at least one the HSDPA user who obtains in the step 101.
Here; Can confirm the sub-district under each HSDPA user according to the strongest pilot frequency channel signal intensity RSCP that each HSDPA user present position receives; Then according to the transmitting power of planning each cell base station in the zone, each HSDPA user's of distance calculation of each HSDPA user and said each cell base station pilot signal quality index.The strongest pilot frequency channel signal intensity RSCP that also can just receive according to each HSDPA user present position confirms the sub-district under each HSDPA user.
Step 103: each the HSDPA user's who obtains according to step 102 pilot signal quality selects the HSDPA user who sets quantity in each sub-district to carry out transfer of data as the scheduling HSDPA user with the scheduling strategy that is provided with.Here some is determined according to the 3GPP planning agreement, and scheduling strategy comprises: maximum pilot signal quality index scheduling strategy, Proportional Fair strategy, polling dispatching strategy.
When scheduling strategy is maximum pilot signal quality index scheduling strategy; Network (WSN) emulation system sorts the HSDPA user of same sub-district according to each HSDPA user's pilot signal quality index from big to small, selects in this sub-district rank to carry out transfer of data the HSDPA user of preceding setting quantity as the scheduling HSDPA user according to ranking results then.
When scheduling strategy is the Proportional Fair strategy; Network (WSN) emulation system sorts the HSDPA user of same sub-district according to each HSDPA user's pilot signal quality index from big to small, selects the HSDPA user who sets quantity in this sub-district to carry out transfer of data as the scheduling HSDPA user in certain proportion according to ranking results then.
When scheduling strategy was the polling dispatching strategy, network (WSN) emulation system selected the HSDPA user who sets quantity in each sub-district to carry out transfer of data as the scheduling HSDPA user at random.
Step 104: the transformat that obtains each scheduling HSDPA user's correspondence according to each scheduling HSDPA user position information.Here can be through HS-PDSCH (High SpeedPacket Downlink Shared Chnnel, the HSDPA Traffic Channel) cqi of link simulation acquisition and the corresponding relation of preset transformat, network (WSN) emulation system is preserved this corresponding relation.Network (WSN) emulation system obtains the Traffic Channel HS-PDSCH cqi of this position according to each scheduling HSDPA user position information of preserving earlier; According to the corresponding relation of preserving, confirm each scheduling HSDPA user's the corresponding transformat of HS-PDSCH cqi then.
Step 105: the transformat according to each scheduling HSDPA user's correspondence in each sub-district of step 104 acquisition is determined this sub-district HSDPA throughput of transmissions.Here; Transformat according to each scheduling HSDPA user's correspondence in each sub-district of step 104 acquisition; Transmission Time Interval according to the 3GPP regulation and stipulation; And the scheduling HSDPA number of users is calculated each scheduling HSDPA user's in said each sub-district transmission rate in each sub-district, and the superposeing of transmission rate with each scheduling HSDPA user in the same sub-district obtains this sub-district HSDPA throughput of transmissions then.
Below in conjunction with Figure of description the embodiment of the invention is described in further detail.
Embodiment 1, and referring to Fig. 2, with the HSDPA system, scheduling strategy is that maximum pilot signal quality index scheduling strategy is that example is described.
Step 201: obtain at least one HSDPA user's in the planning zone distribution, promptly obtain at least one HSDPA user's in the planning zone more specific location information.Here, in the network simulation process, can be with in the various possible distribution fan-in network analogue systems of HSDPA user, in order to the various HSDPA user distribution situations that possibly occur in the simulation actual environment.The planning zone is as shown in Figure 3 in the present embodiment; Comprise two sub-districts; In this zone, having distributed, (UE1～UE10) is with this 10 HSDPA users' more specific location information and need in the essential information input analogue system of two sub-districts of planning for 10 HSDPA users.
Step 202: the pilot channel quality that obtains this HSDPA user according to the position at each HSDPA user place; Confirm the sub-district that each HSDPA user belongs to according to each HSDPA user's pilot channel quality, these the HSDPA users with same sub-district sort at last.
The pilot channel quality index is different in different cdma systems, but all is appreciated that the ratio into available signal power on pilot channel and interference noise power in the physical sense.
As at WCDMA (WCDMA; Wide Code Division Multiple Access) (Ec is every chip ability to use Ec/Io in the system; Io is the interference power spectrum density), in practical application, can equivalence be that RSCP/ (RSSI-RSCP) is as weighing the level that pilot channel receives signal strength signal intensity and interference, wherein; RSCP (Received Signal Code Power, received signal code power); RSSI (ReceivedSignal Strength Indicator receives the signal strength signal intensity indication).And in synchronous CDMA of time-division (TD-SCDMA, Time Division-Synchronous Code Division Multiple Access) system, use C/I (C is that pilot channel receives signal carrier power, and I is for receiving the signal interference power).Be that example is described with C/I as the index of pilot channel quality in the present embodiment.
Regional HSDPA user's distribution is planned in simulation as shown in Figure 3; Network (WSN) emulation system is confirmed the sub-district at each HSDPA user place according to the strongest pilot frequency channel signal intensity (RSCP) in each HSDPA user present position; The RSCP that UE1～UE4 receives sub-district 1 is the strongest, and then UE1～UE4 belongs to sub-district 1; The RSCP that UE5～UE10 receives sub-district 2 is the strongest, and then UE5～UE10 belongs to sub-district 2.Network (WSN) emulation system calculates each HSDPA user's in each sub-district C/I then, and the detailed process of C/I of wherein calculating UE1 is following:
When carrying out network planning process; The transmitting power of the sub-district 1 that network (WSN) emulation system obtains is P1; The transmitting power of sub-district 2 is P2; The available signal power of the sub-district 1 of receiving, UE1 present position is P1+G1-L1 so, and wherein G1 is the base station transmit antennas gain of sub-district 1 to UE1, and L1 is the path loss that sub-district 1 produces apart from UE1.The interference power that UE1 receives the present position is that the transmitting power of sub-district 2 arrives the power that UE1 produces, and is P2+G2-L2, and wherein G2 is the base station transmit antennas gain of sub-district 2 to UE1.L2 is the path loss that sub-district 2 produces apart from UE1.So the C/I of UE1 can be expressed as C/I=(P1+G1-L1)/(P2+G2-L2).
Network (WSN) emulation system calculates each HSDPA user's C/I according to the different user position, and these users of same sub-district are sorted according to the size of C/I.
Step 203: according to the ranking results of step 202; At same Transmission Time Interval (TTI; TransportTime Interval) selects the top-quality N of a pilot channel HSDPA user to carry out transfer of data in, just in same TTI, select N maximum HSDPA user of C/I to carry out transfer of data.Wherein TTI is the 3GPP regulation and stipulation; N is the number of users of dispatching simultaneously; According to the 3GPP regulation and stipulation; N is by in the sub-district; HS-SCCH (High Speed Shared Control Channel, HSDPA shared control channel)/HS-SICH (High Speed Shared Information Cannel, HSDPA shares information channel) channel logarithm decision.Here; The HS-SCCH/HS-SICH channel logarithm of HSDPA cell configuration is 3, and then N must be smaller or equal to 3, here N=3; The HSDPA user who selects C/I value rank front three so is as the scheduling HSDPA user, and selecteed 3 HSDPA users are 3 scheduling HSDPA users.Thereby the PS in the HSDPA technology has been carried out emulation.
Step 204: the position according to each the scheduling HSDPA user who selects in the step 203 obtains the HS-PDSCH channel quality of this position.Wherein, HS-PDSCH channel quality CQI (ChannelQuality Indicator) can pass through the ratio (Eb/N0) of SINR, bit energy and noise power spectral density, and perhaps the ratio of symbol energy and noise power spectral density (Es/N0) is represented.Be that example is described with SINR as the measurement index of channel quality in the present embodiment.According to a HSDPA user who selects in the step 203; According to the path loss of its present position that when planning, obtains apart from the base station; And this sub-district HSDPA traffic channel transmission power, peripheral cell down transmitting power and antenna gain pattern; Can obtain this position available signal power (Ps) and interference power (Pi) and noise power (Pn), thus definite SINR that can reach, SINR=Ps/ (Pi+Pn).According to said method can obtain successively the scheduling HSDPA user's that selects in 203 in steps SINR.
Step 205: according to the SINR that preserves and the corresponding relation of preset transmission format resource combination (TFRC, TransportFormat and Resource Combination), the corresponding TFRC of each scheduling HSDPA user's SINR in the obtaining step 204.
Here because the AMC technical spirit is exactly to transmit according to the transmission resource block that channel quality level is selected to guarantee maximum under certain transmission reliability condition.Suitable transmission block also can be selected according to the signal quality level of current acquisition in the base station in the real network; Therefore in HSDPA emulation; Can be through preserving the corresponding relation of SINR and TFRC, the corresponding TFRC of each HSDPA user's SINR in the obtaining step 204.TFRC has comprised modulation system, coded system and transmission block size; Because the STATIC SIMULATION main target is that the HSDPA throughput performance is planned; Therefore; Here can use the transmission block size as the TFRC index, following reasonable assumption TFRC represents the transmission block size that comprises in the transformat, therefore for the selection of TFRC also just to the selection of transmission block.
Thereby select suitable transmission block to realize emulation to AMC technology in the HSDPA system according to the channel quality of user present position.Here the corresponding relation of the TFRC-SINR that preserves can obtain according to the link simulation method, specifically referring to table 1:
| TFRC | Channel circumstance | SINR(dB) |
| TFRC1 | PA | SINR1 |
| TFRC... | PA | |
| TFRCn | PA |
Table 1
When signal quality deteriorates, take on the HARQ technical spirit selectively to retransmit and guarantee the reliability transmitted.Suppose that the transformat through the AMC choice of technology is that modulation system is QPSK; Code rate is 2/3; So when channel quality degrades can not satisfy transmission reliability; HARQ is technological can to select the some or all of content in the initial transmission piece to retransmit, and therefore just possibly become code rate through the transformat of equivalence after the re-transmission is 1/2, thereby has reduced the transmission rate of effective information.
This shows that the HARQ process is a dynamic process, need to combine the time-varying characteristics of channel circumstance, when under the PA channel circumstance, the transmission block size that SINR1 is corresponding is TFRC1.So after considering the HARQ technology; The efficiency of transmission of HSDPA can reduce, and we can obtain under identical SINR1 condition through link simulation for this reason, considers that HARQ retransmits the effective transmission block size that really can reach afterwards and is TFRC1 '; And TFRC1 ' < TFRC1; Here can obtain TFRC through the method for link simulation, the corresponding relation of TFRC ' and SINR, specifically referring to table 2:
| TFRC’ | TFRC | Channel circumstance | SINR(dB) |
| TFRC1’ | TFRC1 | PA | SINR1 |
| TFRC2’... | TFRC2... | PA | SINR2 |
| TFRCn’ | TFRCn | PA | SINRn |
Table 2
Like this, after step 204 is obtained each scheduling HSDPA user's SINR, obtain corresponding TFRC ', thereby AMC technology and HARQ in the HSDPA system have been carried out emulation according to table 2.
Step 206: each the scheduling HSDPA user's who selects in the calculation procedure 203 transmission rate; The number of users of scheduling is many more simultaneously; It is long more that each user is transmitted the needed time of identical block; Therefore, the corresponding TFRC ' of each scheduling HSDPA user that step 205 is obtained can obtain each scheduling HSDPA user's transmission rate divided by N * TTI.Scheduling HSDPA user's transmission rate sum is this sub-district HSDPA throughput of transmissions in the same sub-district; Each scheduling HSDPA user's transmission rate superposes and has just obtained this sub-district HSDPA throughput of transmissions in the same sub-district that therefore will calculate, thereby has reached the purpose of HSDPA technology introducing back network simulation.
The foregoing description is the snapshot (SnapShot) in the simulation process, carries out repeatedly SnapShot, can obtain scheduling HSDPA user's among each SnapShot transmission rate statistics and each cell transmission speed statistics respectively.At last through will be repeatedly SnapShot average and obtain peak rate and Mean Speed and the peripheral speed that each sub-district can reach.
Embodiment 2: referring to Fig. 4, with the HSDPA system, scheduling strategy is that example is described for the Proportional Fair strategy,
Step 401: obtain at least one HSDPA user's in the planning zone distribution, promptly obtain at least one HSDPA user's in the planning zone more specific location information.Simultaneously, network (WSN) emulation system also obtains the essential information of each sub-district in the planning zone.
Step 402:, and sort according to calculating the HSDPA user of good pilot channel quality with same sub-district according to this user's of position calculation at each HSDPA user place in each sub-district pilot channel quality.
Step 403:, in same TTI, select the top-quality N of a pilot channel HSDPA user to carry out transfer of data with certain probability according to the ranking results of step 402.Be that a selecteed N HSDPA user is N scheduling HSDPA user.Here; The HSDPA cell configuration is confirmed N=3; The HSDPA user that can select the rank front three so is as the scheduling HSDPA user; Also can select rank is 1,2,4, and three the HSDPA user who perhaps selects rank 2,3,6 is as the scheduling HSDPA user, as long as it is just passable to select the top-quality N of a pilot channel HSDPA user to carry out transfer of data with certain probability.
Step 404: the position according to each the scheduling HSDPA user who selects in the step 403 obtains the SINR of this position.
Step 405: according to SINR that preserves and the corresponding relation of TFRC ', the corresponding TFRC ' of each scheduling HSDPA user's SINR in the obtaining step 404.Here can obtain TFRC through the method for link simulation equally, the corresponding relation of TFRC ' and SINR is specifically referring to table 2.
Step 406: each the scheduling HSDPA user's who selects in the calculation procedure 403 transmission rate, with the corresponding TFRC ' of each scheduling HSDPA user can obtain each scheduling HSDPA user divided by N * TTI the transmission rate of obtaining of step 405 acquisition.Each scheduling HSDPA user's in the same sub-district that calculates transmission rate superposeed has just obtained this sub-district HSDPA throughput of transmissions, thereby has reached the purpose that the HSDPA technology is introduced the back network simulation.
The foregoing description is the snapshot (SnapShot) in the simulation process, carries out repeatedly SnapShot, can obtain scheduling HSDPA user's among each SnapShot transmission rate statistics and each cell transmission speed statistics respectively.At last through will be repeatedly SnapShot average and obtain peak rate and Mean Speed and the peripheral speed that each sub-district can reach.
Embodiment 3: referring to Fig. 5, with the HSDPA system, scheduling strategy is described for the polling dispatching strategy.
Step 501: obtain at least one HSDPA user's in the planning zone distribution, promptly obtain at least one HSDPA user's in the planning zone more specific location information.
Step 502: according to this user's of position calculation at each HSDPA user place in each sub-district pilot channel quality; Here only need obtain the strongest pilot frequency channel signal intensity of the position at each HSDPA user place, confirm the sub-district at each HSDPA user place according to the strongest pilot frequency channel signal intensity.
Step 503: in the same TTI in each sub-district, select N HSDPA user to carry out transfer of data at random.Be that a selecteed N HSDPA user is N scheduling HSDPA user.
Step 504: the position according to each the scheduling HSDPA user who selects in the step 503 obtains the SINR of this position.
Step 505: according to SINR that preserves and the corresponding relation of TFRC ', the corresponding TFRC ' of each scheduling HSDPA user's SINR in the obtaining step 403.Here can obtain TFRC through the method for link simulation equally, the corresponding relation of TFRC ' and SINR is specifically referring to table 2.
Step 506: each the scheduling HSDPA user's who selects in the calculation procedure 503 transmission rate, with the corresponding TFRC ' of each scheduling HSDPA user can obtain each scheduling HSDPA user divided by N * TTI the transmission rate of obtaining of step 504 acquisition.Each scheduling HSDPA user's in the same sub-district that calculates transmission rate superposeed has just obtained this sub-district HSDPA throughput of transmissions, thereby has reached the purpose that the HSDPA technology is introduced the back network simulation.
The foregoing description is the snapshot (SnapShot) in the simulation process, carries out repeatedly SnapShot, can obtain scheduling H SDPA user's among each SnapShot transmission rate statistics and each cell transmission speed statistics respectively.At last through will be repeatedly SnapShot average and obtain peak rate and Mean Speed and the peripheral speed that each sub-district can reach.
The method of the described network simulation of the embodiment of the invention not only can be applied to the HSDPA system; Also can be applied to wireless side up link enhancement techniques (HSUPA; HighSpeed Uplink PacketAccess), the evolution (LTE of HSPA+ or 3G; Long Term Evolution) in the system; Can both use the method for network simulation of the present invention this communication system is carried out emulation as long as used the Radio Network System of AMC, HARQ and PS three big key technologies exactly, thus can be under the condition that does not increase system complexity feasible simulation throughput of system performance, accomplish the planning of these systems better.
Network (WSN) emulation system in the embodiment of the invention comprises: obtain unit 100, scheduling unit 200 and definite unit 300.Referring to Fig. 6, wherein,
Obtain unit 100, be used for obtaining each HSDPA user's among said at least one HSDPA user pilot signal quality according at least one HSDPA user position information in the planning zone that obtains;
Further; Obtaining unit 100 is used for confirming the sub-district under each HSDPA user according to the strongest pilot frequency channel signal intensity RSCP that each HSDPA user present position receives; Then according to the transmitting power of planning each cell base station in the zone, each HSDPA user's of distance calculation of each HSDPA user and said each cell base station pilot signal quality index.Certainly, obtain the pilot signal quality index that unit 100 also can not calculate each HSDPA user, only need the sub-district of confirming that each HSDPA user is affiliated.
Confirm that unit 300 is used for obtaining the Traffic Channel HS-PDSCH cqi of this position according to each scheduling HSDPA user position information of preserving; Then according to the HS-PDSCH cqi of preserving and the corresponding relation of preset transformat; Confirm each scheduling HSDPA user's the corresponding transformat of HS-PDSCH cqi; Last transformat according to each scheduling HSDPA user's correspondence in each sub-district; Transmission Time Interval according to the 3GPP regulation and stipulation; And the scheduling HSDPA number of users is calculated each scheduling HSDPA user's in said each sub-district transmission rate in each sub-district, and each scheduling HSDPA user's in the same sub-district superposeing of transmission rate obtained this sub-district HSDPA throughput of transmissions.
In sum; Embodiment of the invention network (WSN) emulation system whenever carries out SnapShot one time, can obtain scheduling HSDPA user's among each SnapShot transmission rate and each sub-district HSDPA throughput of transmissions, carries out repeatedly SnapShot; Can obtain scheduling HSDPA user's among each SnapShot transmission rate statistics and each cell transmission speed statistics respectively; At last through will be repeatedly SnapShot average and obtain peak rate and Mean Speed and the peripheral speed that each sub-district can reach, like this, to the Radio Network System after the introducing of HSDPA technology; Under the prerequisite that does not increase the STATIC SIMULATION computation complexity, obtain reasonably; HSDPA throughput of transmissions more accurately, therefore, the Radio Network System of having used AMC, HARQ and PS three big key technologies is after the method for using network simulation of the present invention; Can be under the condition that does not increase system complexity feasible simulation throughput of system performance, accomplish the planning of these systems better.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, belong within the scope of claim of the present invention and equivalent technologies thereof if of the present invention these are revised with modification, then the present invention also is intended to comprise these changes and modification interior.
Claims (12)
1. obtain the method for high-speed downlink packet access HSDPA throughput of transmissions in the network simulation, it is characterized in that, comprising:
According at least one HSDPA user position information in the planning zone that obtains, obtain each HSDPA user's among said at least one HSDPA user pilot signal quality;
Pilot signal quality according to said each HSDPA user selects the HSDPA user who sets quantity in each sub-district to carry out transfer of data as the scheduling HSDPA user with the scheduling strategy that is provided with; Wherein, said scheduling strategy comprises: maximum pilot signal quality index scheduling strategy, Proportional Fair strategy or polling dispatching strategy;
Confirm this sub-district HSDPA throughput of transmissions according to each scheduling HSDPA user position information in each sub-district.
2. the method for claim 1 is characterized in that, said according at least one HSDPA user position information in the planning zone that obtains, the pilot signal quality that obtains each HSDPA user among said at least one HSDPA user comprises:
The strongest pilot frequency channel signal intensity RSCP that receives according to each HSDPA user present position confirms the sub-district under each HSDPA user;
According to the transmitting power of each cell base station in the planning zone, each HSDPA user's pilot signal quality index in each sub-district of the distance calculation of each HSDPA user and said each cell base station.
3. method as claimed in claim 2; It is characterized in that; When said scheduling strategy was maximum pilot signal quality index scheduling strategy, the HSDPA user that said pilot signal quality according to said each HSDPA user selects to set in each sub-district quantity with the scheduling strategy that is provided with carried out transfer of data as the scheduling HSDPA user and comprises:
The HSDPA user of same sub-district is sorted according to each HSDPA user's pilot signal quality index from big to small;
Carry out transfer of data the HSDPA user of preceding setting quantity as the scheduling HSDPA user according to rank in this sub-district of ranking results selection.
4. method as claimed in claim 2; It is characterized in that; When said scheduling strategy was the Proportional Fair strategy, said pilot signal quality according to said each HSDPA user carried out transfer of data with the HSDPA user who sets quantity in each sub-district of scheduling strategy scheduling that is provided with as the scheduling HSDPA user and comprises:
The HSDPA user of same sub-district is sorted according to each HSDPA user's pilot signal quality index from big to small;
Select the HSDPA user who sets quantity in this sub-district to carry out transfer of data in certain proportion according to ranking results as the scheduling HSDPA user.
5. method as claimed in claim 2; It is characterized in that; When scheduling strategy was the polling dispatching strategy, said pilot signal quality according to said each HSDPA user carried out transfer of data with the HSDPA user who sets quantity in each sub-district of scheduling strategy scheduling that is provided with as the scheduling HSDPA user and comprises:
Select the HSDPA user who sets quantity in each sub-district to carry out transfer of data at random as the scheduling HSDPA user.
6. method as claimed in claim 2 is characterized in that, saidly confirms that according to each scheduling HSDPA user position information in each sub-district this sub-district HSDPA throughput of transmissions comprises:
Obtain the Traffic Channel HS-PDSCH cqi of this position according to each scheduling HSDPA user position information;
According to the HS-PDSCH cqi of preserving and the corresponding relation of preset transformat, confirm each scheduling HSDPA user's the corresponding transformat of HS-PDSCH cqi;
According to the transformat of each scheduling HSDPA user's correspondence in each sub-district, the Transmission Time Interval of 3GPP regulation and stipulation, and the scheduling HSDPA number of users is calculated each scheduling HSDPA user's in said each sub-district transmission rate in each sub-district;
Each scheduling HSDPA user's in the same sub-district superposeing of transmission rate obtained this sub-district HSDPA throughput of transmissions.
7. a network (WSN) emulation system that obtains the HSDPA throughput of transmissions is characterized in that, comprising:
Obtain the unit, be used for obtaining each HSDPA user's among said at least one HSDPA user pilot signal quality according at least one HSDPA user position information in the planning zone that obtains;
Scheduling unit; Be used for selecting the HSDPA user who sets quantity in each sub-district to carry out transfer of data with the scheduling strategy that is provided with as the scheduling HSDPA user according to said each HSDPA user's pilot signal quality; Wherein, said scheduling strategy comprises: maximum pilot signal quality index scheduling strategy, Proportional Fair strategy or polling dispatching strategy;
Confirm the unit, be used for confirming this sub-district HSDPA throughput of transmissions according to each scheduling HSDPA user position information in each sub-district.
8. network (WSN) emulation system as claimed in claim 7 is characterized in that, said acquisition unit comprises:
Confirm subelement, be used for confirming the sub-district under each HSDPA user according to the strongest pilot frequency channel signal intensity RSCP that each HSDPA user present position receives;
Computation subunit is used for the transmitting power according to each cell base station in the planning zone, each HSDPA user's of distance calculation of each HSDPA user and said each cell base station pilot signal quality index.
9. network (WSN) emulation system as claimed in claim 8 is characterized in that, said scheduling unit comprises:
The first ordering subelement is used for the HSDPA user of same sub-district is sorted according to each HSDPA user's pilot signal quality index from big to small;
The first chooser unit is used for carrying out transfer of data the HSDPA user of preceding setting quantity as the scheduling HSDPA user according to rank in this sub-district of ranking results selection.
10. network (WSN) emulation system as claimed in claim 8 is characterized in that, said scheduling unit comprises:
The second ordering subelement is used for the HSDPA user of same sub-district is sorted according to each HSDPA user's pilot signal quality index from big to small;
The second chooser unit is used for selecting the HSDPA user who sets quantity in this sub-district to carry out transfer of data as the scheduling HSDPA user in certain proportion according to ranking results.
11. network (WSN) emulation system as claimed in claim 8 is characterized in that, said scheduling unit comprises:
The 3rd chooser unit is used for selecting at random the HSDPA user who sets quantity in each sub-district to carry out transfer of data as the scheduling HSDPA user.
12. network (WSN) emulation system as claimed in claim 8 is characterized in that, said definite unit comprises:
Obtain subelement, be used for obtaining the Traffic Channel HS-PDSCH cqi of this position according to each scheduling HSDPA user position information;
Confirm subelement, be used for, confirm each scheduling HSDPA user's the corresponding transformat of HS-PDSCH cqi according to the HS-PDSCH cqi of preserving and the corresponding relation of preset transformat;
Computation subunit; Be used for transformat according to each scheduling HSDPA user's correspondence in each sub-district; The Transmission Time Interval of 3GPP regulation and stipulation, and the scheduling HSDPA number of users is calculated each scheduling HSDPA user's in said each sub-district transmission rate in each sub-district;
The stack subelement is used for each scheduling HSDPA user's in the same sub-district superposeing of transmission rate obtained this sub-district HSDPA throughput of transmissions.
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| CN103945552B (en) | 2013-01-18 | 2017-12-05 | 华为技术有限公司 | The dispatching method and dispatching device of user equipment in communication system |
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